Friction shock-absorbing mechanism



' Aug(- 19 1924;; 1,505,41

J. F. CONNOR "FRITIoN SHOCK, ABSORBING MEGHANISM Original Filed NQv. l.1920 2 Sheets-Sheet l www awr Aug. 19 ,71924, 1,505,415

J. F. oCoNNoR FRICTION SHOCK ABSORBING MECHANISM Originall Filed Nov. 1,1926 2 Sheets-Sheet. 2

Patented ug. 19, 1924.

UNITED STATES romv r. ooomvon, or enloaso, I

rATaNr foreros;

minors,` AssIeNoa, BY Massin AssIeNi/innrs'ro w. H, Minna, INC.,aooarona'rlon or' nnnnwa'na.

FRICTION SHOCK-ABSORBING IVIIEIGI-IANISBIf.y

application filed. November 1, 1920, sei-iaiNo. 421,165. Renewedretinal-51.11,19221.l

To all whom t 'may concern:

Be it known that I, JOHNk F. OlCoNnoR, a citizen of United States,lresiding at Chicago, in the county of Cook. and State of Illinois, .haveinvented a certain-'new and useful Improvement in Friction ShockfAbsorbing Mechanisms, of which .the following is a full, clear,concise,- and exact description, reference being had to the accompanyingdrawings, forming a part of this specification.

This invention relates to improvements in friction shock absorbingmechanisms.

The objecty of the invention is to provide a friction shock absorbingmechanism especially adapted for railway draft riggings Figure 3 is anelevational Vviewfof the friction unit, the elevation y being at 90 tothe showing of' the same unit occurring in Figure 1. Figure 4 is a groupView of the friction unit with the parts separated but showing theirrelative positions, only two of the friction shoes being shown. Fign ure5 is a view similar to Figure 4 taken y"at QOpfrelatively thereto. AndFigure 6 is an enlarged sectional view through the frictionA unit andcorresponding substantially to the line 6 6 of Figure 3.

In said drawings, 10-10 ydenotechannel draft sills of a railway car tothe inner faces of which are secured front stop lugs 11-11 and rear stoplugs l2-12. A portion of a drawbar is indicated at 13, the ysame beingoperatively associated with the shock absorbing mechanism proper bymea-ns4 of a hooded cast yoke 14 and couplerkeyl arranged in the usualmanner. The shock absorbing mechanism proper, hereinafter described, anda front follower 16 are dishowever, being shown in end elevation.

posedwithin theyoke. The yoke `movable parts associated therewith aresupportf @dhr a-detahble Saddle plete .17,

The y.improved shock absorbing` mechanism proper, as shown, comprises,broadly,

`a combined friction shellv and spring cage casting` A; a'springresistance B; two sets of friction shoes CTC and D-i-ID; an outerwedgeE; an niner wedgeF; a spring fol-,

lower G; and a yretainer boltI-I.

The casting A hasthe friction shell proper 1S formed atthe forward endthereof, saidy shell having `an interior cylindrical friction surface ofwell known form. `The rearportion 29 of the casting A constitutes thespring cage and is also preferably ofy cylindrical form to act as acentering device for the spring resistance B. The casting A has anintegral'rear wall 30 laterally eX,-.

tended and suitably reinforced to adapt the same to act asl the rearfollower ofy the mechanism in .cooperation with the said lugs 12.

The spring resistance B is or .may ,be`

of wellknown form andv comprises an outer heavy coil and an innerlighter nested coil, the same'bearing at theiry rear ends against therear of the "casting A and at their yforward ends Aagainst a disc-lilesphing follower G. The retainer bolt y f passes throughv the center ofthe spring'resistance andathrough suitabl'eopenings in the rear lwall ofthe lcasting` A, in the followerkG,

and wedges E and F, said bolt serv-ing to retainthe ApartsA in assembledrelation and also to'hold thel Spring resistance under an linitialcompression, when desired.

Four friet-ion shoes are shown, arranged circular-'ly yas clearlyindicated in Figure 6. y

The diagonally disposed shoes areof like construction, that is, theshoes C-Gfare of like construction vand the shoes D-`D are of likeconstruction; As will be understood as the ydescription proceeds, allshoes are rcomplementally constructed and separate descriptions for eachshoe will not be neces` sary. Eachof the shoes is formed ywith arearwardly and inwardly inclined wedge face 19, the same being disposedopposite each other and having a relatively blunt included angletherebetween.

ioo

The front wedge is# fOrmed with corresponding wedge faces ll9fl19adapted to engage and 'erate correspondingly disposed wedge faces120-120 on-the rear or inner wedge F. As will be clear from aninspection of Figure 6, the rear wedge F tends to spread the Vri hthandpair of shoes C and D and. the lef tion effected bv the wedge E.

As best shown inl Figure 5, it will be noted that the'wedge E is cutoutat its center as indicated at 21 so as to leave, in eect, two spacedarms 22-22, y the latter having a ortion of the wedge faces 119 thereon.

imilarly in the case of the rear or inner wedge F, it is cut away at itscenter on the end adjacent the Wedge E, as indicated at 23, thus leavingspaced forwardly projecting arms24--24L The Wedge faces 119 `of the cwedge E are angularly offset preferably 90O with respect to the wedgefaces 120 on the c other wedge F and by cutting away the twoA wedges at21 and 23, respectively, as above described, the arms 22 and 24 areadapted to be 'overlapped longitudinally or lengthwise of the shell. thewedge faces l19 and 2O of the shoes are longitudinally overlapped sothat, a section takenas in the case of Figure 6 perpendicularly to theaXis of the shell, will interv sect all sets of wedge faces 19, 20, 119and 120. With this arrangement, not only am I enabled to employrelatively blunt andrelay 'tively keenwedging angles to 'obtain highcapacity and insure release, but the friction unitJVA is made'unusuallycompact in a lengthwisel direction which in turn enables me to employaspring of usual length and amount .of compression. The operation of thedevice Lis thoughtto be suiiiciently clear in view of the precedingdescription without a further detailed explanation. v l

I have herein shown and described what I now consider the preferredmanner of carryin out the invention but the same is mere y illustrativeand I contemplate kall changes and modifications that come withinthe'scope of the claims appended hereto.

I claim:

t 1. In a friction shock absorbing mechanism, the combination with afriction shell;`Y

of a spring resistance; and a friction unit movable as an entiretylongitudinally ofthe Vshell and cooperable with the shell and thand pairof shoes D and C vertically, that is, at right angles to the spreadingac- Correspondingly spring resistance, said unit comprising, a pluralityof friction shoes, an outer wedge, and an inner wedge, said outer wedgeand shoes having cooperating Wedge faces diverging in one direction andthe inner wedge and shoes having cooperating wedge faces diverging inthe opposite direction, all of said wedge faces being so relativelydisposed that a sectional plane perpendicular to the aXis of the shellmay be taken to intersect all of them.

2. In a friction shock absorbing mechanism, the lcombination with afriction shell of a spring resistance; and a friction unit movable as anentirety longitudinally of the shell and cooperable with the shell andspring resistance, said unit comprising, a plurality of friction shoes,outer wedging means having wedge faces cooperable with wedge faces onthe shoes, 'and inner wedging means having wedge faces cooperable withother wedge faces on the shoes', all of said wedge 4.' In a frictionshock absorbing mecha` nism, the combination with a friction shell; of aspring resistance; and a friction unit movable Vas an entiretylongitudinally of lthe shell and cooperable with the shell and springresistance, said unit comprising, a yplurality of friction shoes, Vanouter wedge, and an inner wedge, said outer wedge and shoes havingcooperating wedge faces divergingin one direction and the inner wedgeand shoes having cooperating wedge faces diverg- 4 ing in the oppositedirection, the rst named set of cooperating wedge faces Abeing angularlyoffset substantially 90 with respect ifzo the second named set ofcooperable wedge aces. i v

5. In a friction shock absorbing mechanism, the combination with afriction shell; of a spring resistance; and a friction unit cooperablewith the shell and spring resistance, said unit comprising, a pluralityof friction shoes movable longitudinally of `,the shell, an outer wedge,and an inner wedge, said outer wedge and shoes having cooperating wedgefaces converged inwardly of the shell, and the inner wedge and shoeshaving cooperating wedge faces converged outwardly of the shell,V theincluded angle between one set of said cooperating wedge faces beingrelatively blunt and the rincluded angle between the cooperating wedgefaces of the other set being relatively acute, all of said wedge facesbeing sorelatively disposed that a sectional plane perpendicular to theaxis of the shell may be taken to intersect all of them. y

y 6. In a friction shock absorbing mechanisni, the combination with afriction shell of a spring resistance; and a friction unit cooperablewith the shell and spring resistance,l

said unit comprising, a plurality of friction shoes, an outer wedge, andan inner wedge,

said outer wedge and shoes having cooperating wedge faces convergedinwardlyof the shell, and the inner wedge and shoes having cooperatingwedge faces converged outwardly of the shell, the included angle betweenone set of said cooperating wedge faces being relatively blunt and theincluded angle between the cooperating wedge faces of the other setbeing relatively acute, the f last named set of cooperating wedge facesbeing angularly offset substantially `90 with respect tothe other set ofcooperating wedge faces.

7. In a frictionshock absorbing mechanism, the combination with afriction shell having an interior cylindrical friction sur* face; of aspring resistance; a plurality of friction shoes cooperable with andmovable longitudinally of said shell and arranged in a circular seriestherein; of an outer wedge, said wedge and shoes having cooperatingwedge faces converged inwardly of the shell;

andan inner wedge, said inner wedge and shoes having cooperating wedgefaces con! verged outwardly of the shell, all of said wedge faces beinglongitudinallyy overlapped and the wedge faces ofthe rstnamed set being`angularly offset substantially 90 with respect to the second named set.

In 'witness that I claim the foregoing I havehereunto subscribed my namethis 23rd day of Oct., 1920. j

, e f JOHN EOCONNOR. Witness: f

,CARRIE GAILING.

